package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalanced;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {
    //地址
    // public static final String PAYMENT_URL = "http://localhost:8001";
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";
    @Resource
    private RestTemplate restTemplate;
    @Resource
    private LoadBalanced loadBalanced;
    @Resource
    private DiscoveryClient discoveryClient;

    //http://localhost/consumer/Payment/create?serial=测试
    @GetMapping("/consumer/Payment/create")
    public CommonResult<Payment> crete(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/Payment/create/", payment, CommonResult.class);
    }

    //http://localhost/consumer/Payment/getPaymentById/1
    @GetMapping("/consumer/Payment/getPaymentById/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/Payment/getPaymentById/" + id, CommonResult.class);
    }

    //返回对象为ResponseEntity对象，包含了响应中的一些重要信息 比如  响应头 相应状态码，响应体等
    @GetMapping("/consumer/Payment/entity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/Payment/getPaymentById/" + id, CommonResult.class);
        // 2xx代表成功  以此类推 5xx代码错 4xx参数传递问题
        if (entity.getStatusCode().is2xxSuccessful()) {
            // log.info(entity.getStatusCode()+"\t");
            return entity.getBody();
        } else {
            return new CommonResult<>(500, "操作失败");
        }
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if(instances==null || instances.size()<=0){
            return null;
        }
        ServiceInstance serviceInstance=loadBalanced.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/Payment/lb",String.class);
    }
}
